With Piranesi for Mac OS X, architects and designers can start with simple models and renderings, and use Piranesi's patented "3D Painting" technology to quickly fill in missing detail and produce artistic, hand-drawn effects. Piranesi images can be produced from 3DS or DXF models; in addition, many popular Macintosh 3D applications such as Art*lantis, CINEMA 4D, form*Z, and LightWave provide direct interfaces. SketchUp version 3.1 (due later this year) will also have a direct interface, and other applications are expected to follow suit.

CUTOUTS
- in rare cases, a cutout could be drawn in front of the model when it was placed behind it
- after deleting a cutout from a cutout group, remaining cutouts were duplicated
- possible crash when deleting cutouts
- possible crash when tweaking a 3D cutout
- (Mac) possible crash using Tweak Cutout contextual menu on Mountain Lion

STYLES
- (Mac) style recorder "delete" menu now deletes selected styles, not all of them
- (Mac) style recorder "save" menu now saves selected styles, not all of them
- (Mac) possible crash when pasting a style with non-ASCII characters in its name
- (Mac) blend and opacity controls are available for Layer Blend command style
- (Mac) display image from thumbnail file if the style has one
- possible crash in drag-and-drop with nested categories, and don't flatten categories
- after style recording has stopped, recorded styles are not changed by undo/redo
- (Windows) show single icon in style recorder for repeated strokes with the same settings